gnucash maint: Fix missing prototype error.

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/c2972c75 (commit)
	from  https://github.com/Gnucash/gnucash/commit/9db7d894 (commit)



commit c2972c75d075b286b630e8954a4bc7b4968e984e
Author: John Ralls <jralls at ceridwen.us>
Date:   Fri Jul 13 12:18:25 2018 -0700

    Fix missing prototype error.



Summary of changes:
 gnucash/import-export/ofx/gnc-ofx-import.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)